Sub Test()
Dim dict As Object
Dim cel As Range
Set dict = CreateObject("Scripting.Dictionary")
dict.CompareMode = vbTextCompare
dict.Add Key:="INDIA", Item:="IN"
dict.Add Key:="USA", Item:="U"
dict.Add Key:="UK", Item:="K"
For Each cel In Range("A2:A" & Cells(Rows.Count, 1).End(xlUp).Row)
If dict.exists(cel.Value) Then
cel.Offset(, 1).Value = dict.Item(cel.Value)
End If
Next cel
End Sub